Question

the number of boy and girls in the class is equals. the number of boys is 4 less than twice the number 12. find the number of boys and girls.

Answer 1

Let the number of boys be x
and girls be y.

We have,
x=y

and

x=12×2-4
x=20

Therefore since x=y,
Number of boys=20.
Number of girls=20.

Hope it helped.
^_^

Answer 2

Twice of twelve =12×2=24
4 less in that=24-4=20
So,the no of boys is 20,
As the no of boys and girls are equal so no of girls also 20
Here your answer